Pcs- Programming In C# Test For Aptech
C# is here Variable of reference type store the memory address of other variables in a Stack.
- 1.Variables of this data types store actual values.This value stored in a stack.
- A.
Value Type
- B.
Reference Type.
- 2.Variable of reference type store the memory address of other variables in a Stack.
- A.
True
- B.
False
- 3.The built-in reference data types are : - 2 choices
- A.
Class
- B.
Object
- C.
Delegate
- D.
Array , Interface
- E.
String
- 4.XML Comments begin with :
- A.
Three forward slashes
- B.
Three asterisks
- C.
Double slashes
- 5.Constants are declared for value types rather than for reference types.
- A.
True
- B.
False
- 6.This statement ensure that no other process or threads running in the computer memory can interfere with the code. ensure security and only work with reference type.
- A.
Selection statement
- B.
Iteration statement
- C.
Jump Statement
- D.
Fixed Statement
- E.
Lock Statement
- 7.This statement is required to tell the garbage collector not to move that object during execution.
- A.
Jump Statement
- B.
Lock statement
- C.
Fixed Statement
- D.
Check ed and Unchecked Statement
- 8.Which statements are true?
- A.
The conditional operator works with two operands
- B.
The increment operator works with a single operand
- C.
The bitwise exclusive OR operator compares bits and return 1 if only one of the bits is -1.
- D.
The conditional && operator does not check the seconds expression if the first expression is false
- E.
The compound assignment operators execute from right to left.
- 9.This typeCasting is carried out automatically by the compiler.
- A.
Explicit
- B.
Implicit
- 10.The class which provides useful methods to convert any built-in data type to another built-in data type.
- A.
System.Console.Convert
- B.
System.Convert
- 11.This refers to converting a reference type to a value type.
- A.
Boxing
- B.
UnBoxing
- 12.This is a process for converting a value type to its reference type. this useful to reduce the overhead on the system during execution.
- A.
UnBoxing
- B.
Boxing
- 13.This array is a multi-dimensional array and is reference to as an array of arrays.It considers of multiple arrays where the number of elements within each array can be different.
- A.
Rectangular Array.
- B.
Jagged Array.
- 14.This has improved performance and unequal number of columns.
- A.
Rectangular Array
- B.
Single- dimensional Array
- C.
Jagged Array
- D.
Multi- dimensional Array
- 15.This has many rows and columns.
- A.
Multi- dimensional Array
- B.
Single- dimensional Array
- C.
Rectangular Array
- D.
Jagged Array
- 16.This allows you to create arrays using the CreateInstance() method.
- A.
Array
- B.
New
- C.
Array class
- 17.Method which is used to create Multi- Dimension Array
- A.
Public static Array CreateInstance(type elementType, int length);
- B.
Public static Array CreateArray(type elementType, int length);
- C.
Public static Array CreateInstance(type elementType, int rows, int columns);
- 18.This is the feature of extracting only the required information from object.It's not show all technical details of object.
- A.
Encapsulation
- B.
Inheritance
- C.
Abstraction
- D.
Polymorphism
- 19.Details of what a class contains need not be visible to other classes and objects that use it.
- A.
Encapsulation
- B.
Inheritance
- C.
Polymorphism
- D.
Abstraction
- 20.A method name can be an underscore or the "@" character.
- A.
True
- B.
Fasle
- 21.This variable is a special type that is accessed without using an Object of a class.
- A.
Public variable
- B.
Protect variable
- C.
Static variable
- D.
Final
- 22.This acces modifier allows the class members to be accessible within the class as well as within the derived class.
- A.
Internal
- B.
Protected
- C.
Private
- 23.This access modifier allows the class members to be accessible only within the classes of the same assembly.
- A.
Protected
- B.
Public
- C.
Internal
- 24.This keyword causes arguments to passed in a method by reference.- 2 choices
- A.
Args
- B.
Ref
- C.
Reg
- D.
This
- E.
Out
- 25.The keyword is used to resolve conflicts between variables having same names and to pass the current object as a parameter.
- A.
Out
- B.
This
- C.
Ref
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